Results for "Zhen Xiang"

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Representations of Hopf Ore extensions of group algebras and pointed Hopf algebras of rank oneSep 28 2013Jan 14 2015In this paper, we study the representation theory of Hopf-Ore extensions of group algebras and pointed Hopf algebras of rank one over an arbitrary field $k$. Let $H=kG(\chi, a,\d)$ be a Hopf-Ore extension of $kG$ and $H'$ a rank one quotient Hopf algebra ... More
Hopf-Ore Extensions and Hopf Algebras of Rank OneJun 18 2012Mar 17 2015In this paper, we study pointed rank one Hopf algebras and Hopf-Ore extensions of group algebras, over an arbitrary field $k$. It is proved that the rank of a Hopf-Ore extension of a group algebra is one or two or infinite. It is also shown that an arbitrary ... More
Adversarial Learning in Statistical Classification: A Comprehensive Review of Defenses Against AttacksApr 12 2019May 13 2019There is great potential for damage from adversarial learning (AL) attacks on machine-learning based systems. In this paper, we provide a contemporary survey of AL, focused particularly on defenses against attacks on statistical classifiers. After introducing ... More
Semantic Graph for Zero-Shot LearningJun 16 2014Jun 03 2015Zero-shot learning aims to classify visual objects without any training data via knowledge transfer between seen and unseen classes. This is typically achieved by exploring a semantic embedding space where the seen and unseen classes can be related. Previous ... More
MobileFaceNets: Efficient CNNs for Accurate Real-Time Face Verification on Mobile DevicesApr 20 2018Jun 15 2018We present a class of extremely efficient CNN models, MobileFaceNets, which use less than 1 million parameters and are specifically tailored for high-accuracy real-time face verification on mobile and embedded devices. We first make a simple analysis ... More
A Mixture Model Based Defense for Data Poisoning Attacks Against Naive Bayes Spam FiltersOct 31 2018Naive Bayes spam filters are highly susceptible to data poisoning attacks. Here, known spam sources/blacklisted IPs exploit the fact that their received emails will be treated as (ground truth) labeled spam examples, and used for classifier training (or ... More
The energy change of the complete multipartite graphNov 11 2017The energy of a graph is defined as the sum of the absolute values of all eigenvalues of the graph. Akbari et al. \cite{S. Akbari} proved that for a complete multipartite graph $K_{t_1 ,\ldots,t_k}$, if $t_i\geq 2 \ (i=1,\ldots,k)$, then deleting any ... More
Wormholes without exotic matter in nonminimal torsion-matter coupling $f(T)$ gravityJun 25 2019Wormholes are hypothetical tunnels that connect remote parts of spacetime. In General Relativity, wormholes are threaded by exotic matter that violates the energy conditions. In this work, we consider wormholes threaded by nonexotic matter in nonminimal ... More
A note on Ξ_c(3055)^+ and Ξ_c(3123)^+Oct 01 2007Oct 03 2007Babar Collaboration announced two new excited charmed baryons $\Xi_c(3055)^+$ and $\Xi_c(3123)^+$. We study their strong decays assuming they are D-wave states. Some assignments are excluded by comparing our numerical results with the experimental values ... More
The leading term of the He$-\bar{p}\mbox{He}^+$ long-range interactionSep 21 2015Oct 30 2015The long range interaction between an antiprotonic helium atom $\bar{p}$He$^+$ and helium atom in its ground state is studied. We calculate the dispersion coefficients $C_6$ using the Complex Coordinate Rotation (CCR) formalism in order to comply with ... More
RetGK: Graph Kernels based on Return Probabilities of Random WalksSep 07 2018Graph-structured data arise in wide applications, such as computer vision, bioinformatics, and social networks. Quantifying similarities among graphs is a fundamental problem. In this paper, we develop a framework for computing graph kernels, based on ... More
Artificial-Noise-Aided Physical Layer Phase Challenge-Response Authentication for Practical OFDM TransmissionFeb 26 2015Feb 17 2016Recently, we have developed a PHYsical layer Phase Challenge-Response Authentication Scheme (PHY-PCRAS) for independent multicarrier transmission. In this paper, we make a further step by proposing a novel artificial-noise-aided PHY-PCRAS (ANA-PHY-PCRAS) ... More
Dynamics study of $Z^+(4430)$ and X(3872) in molecular pictureFeb 21 2008Mar 24 2008In this talk, we review our recent work about the dynamical studies of $Z^+(4430)$ and X(3872). $Z^+(4430)$ can not be explained as a $D_1'D^*$ or $D_1D^*$ molecular state only considering one pion exchange potential without the cutoff, which needs to ... More
Localization of five-dimensional Elko Spinors on dS/AdS Thick BranesDec 19 2018Different from the Dirac spinor, the localization of a five-dimensional Elko spinor on a brane with codimension one is very difficult {because of} the special structure of the Elko spinor. By introducing the coupling between the Elko spinor and the scalar ... More
Extraordinary spin density and energy back-flow under interferenceJun 11 2018A novel phenomenon was reported recently that the "local optical spin density" based on Poynting vector might be counter-intuitively opposite to the integrated spin orientation while the one related to the canonical expression might not [Leader, Phys. ... More
Free-rider Episode Screening via Dual Partition ModelMay 19 2018One of the drawbacks of frequent episode mining is that overwhelmingly many of the discovered patterns are redundant. Free-rider episode, as a typical example, consists of a real pattern doped with some additional noise events. Because of the possible ... More
Artificial-Noise-Aided Message Authentication Codes with Information-Theoretic SecurityNov 17 2015In the past, two main approaches for the purpose of authentication, including information-theoretic authentication codes and complexity-theoretic message authentication codes (MACs), were almost independently developed. In this paper, we propose a new ... More
Effects of decoherence on diabatic errors in Majorana braidingFeb 15 2019The braiding of two non-Abelian Majorana modes is important for realizing topological quantum computation. It can be achieved through tuning the coupling between the two Majorana modes to be exchanged and two ancillary Majorana modes. However, this coupling ... More
Revealing the Complicated Story of the Cetus Stream with StarGOFeb 14 2019Jun 29 2019We use a novel cluster identification tool StarGO to explore the metal poor ([Fe/H] $<$ -1.5) outer stellar halo (d $>$ 15 kpc) of the Milky Way using data from Gaia, LAMOST and SDSS. Our method is built using an unsupervised learning algorithm, a self-organizing ... More
Tunable stress and controlled thickness modification in graphene by annealingMay 07 2008Graphene has many unique properties which make it an attractive material for fundamental study as well as for potential applications. In this paper, we report the first experimental study of process-induced defects and stress in graphene using Raman spectroscopy ... More
SurfCon: Synonym Discovery on Privacy-Aware Clinical DataJun 21 2019Unstructured clinical texts contain rich health-related information. To better utilize the knowledge buried in clinical texts, discovering synonyms for a medical query term has become an important task. Recent automatic synonym discovery methods leveraging ... More
Dynamics of the one-dimensional random transverse Ising model with next-nearest-neighbor interactionsOct 21 2008Oct 22 2008The dynamics of the one-dimensional random transverse Ising model with both nearest-neighbor (NN) and next-nearest-neighbor (NNN) interactions is studied in the high-temperature limit by the method of recurrence relations. Both the time-dependent transverse ... More
Is Z^+(4430) a loosely bound molecular state?Nov 05 2007Nov 30 2007Since $Z^+(4430)$ lies very close to the threshold of $D^\ast{\bar D}_1$, we investigate whether $Z^+(4430)$ could be a loosely bound S-wave state of $D^\ast{\bar D}_1$ or $D^\ast{\bar D}^\prime_1$ with $J^P=0^-, 1^-, 2^-$, i.e., a molecular state arising ... More
Raman spectroscopy and imaging of grapheneOct 16 2008Graphene has many unique properties that make it an ideal material for fundamental studies as well as for potential applications. Here we review the recent results on the Raman spectroscopy and imaging of graphene. Raman spectroscopy and imaging can be ... More
Radial Velocity Retrieval for Multichannel SAR Moving Targets with Time-Space Doppler De-ambiguityOct 01 2016Jun 09 2017In this paper, with respect to multichannel synthetic aperture radars (SAR), we first formulate the problems of Doppler ambiguities on the radial velocity (RV) estimation of a ground moving target in range-compressed domain, range-Doppler domain and image ... More
Emergent Symmetry and Conserved Current at a One Dimensional Incarnation of Deconfined Quantum Critical PointMar 29 2019The deconfined quantum critical point (DQCP) was originally proposed as a continuous transition between two spontaneous symmetry breaking phases in 2D spin-1/2 systems. While great efforts have been spent on the DQCP for 2D systems, both theoretically ... More
Auto-Encoder Guided GAN for Chinese Calligraphy SynthesisJun 27 2017In this paper, we investigate the Chinese calligraphy synthesis problem: synthesizing Chinese calligraphy images with specified style from standard font(eg. Hei font) images (Fig. 1(a)). Recent works mostly follow the stroke extraction and assemble pipeline ... More
Precision spectroscopy of the hydrogen molecular ions HD$^+$Nov 29 2012Dec 01 2012Expectation values of the Breit operators and the $Q$ terms are calculated for HD$^+$ with the vibrational number $v=0-4$ and the total angular momentum $L=0-4$. Relativistic and radiative corrections to some ro-vibrational transition frequencies are ... More
Scalable orbital-angular-momentum sorting without destroying photon statesOct 08 2016Single photons with orbital angular momentum (OAM) have attracted substantial attention from researchers. A single photon can carry infinite OAM values theoretically. Thus, OAM photon states have been widely used in quantum information and fundamental ... More
A New Improved Energy-Momentum Tensor and Its Possible Role in GravityMar 03 2019Motivated by a special consideration in quantum measurement, we present a new improved energy-momentum tensor. The new tensor differs from the traditional canonical and symmetric ones, and can be derived as Nother current from a Lagrangian with second ... More
User Fairness Non-orthogonal Multiple Access (NOMA) for 5G Millimeter-Wave Communications with Analog BeamformingNov 07 2018The integration of non-orthogonal multiple access in millimeter-Wave communications (mmWave-NOMA) can significantly improve the spectrum efficiency and increase the number of users in the fifth-generation (5G) mobile communication. In this paper we consider ... More
Localization of five-dimensional Elko spinors with non-minimal coupling on thick branesOct 08 2017Aug 07 2018It has been found that the zero mode of a five-dimensional Elko spinor could be localized on branes by introducing a Yukawa-type coupling between the Elko spinor and the background scalar field or the Ricci scalar. However, the Yukawa-type coupling is ... More
Probing the $XYZ$ states through radiative decaysMar 31 2014Aug 01 2014In this work, we have adopted the spin rearrangement scheme in the heavy quark limit and extensively investigated three classes of the radiative decays: $\mathfrak{M}\to (b\bar{b})+\gamma$, $(b\bar{b})\to \mathfrak{M}+\gamma$, $ \mathfrak{M} \to \mathfrak{M}^\prime+\gamma$, ... More
$D\bar{D}$ production and their interactionsMay 13 2010Aug 03 2010S and P wave $D\bar{D}$ scatterings are studied in a meson exchange model with the coupling constants obtained in the heavy quark effective theory. With the extracted P wave phase shifts and the separable potential approximation, we include the $D\bar{D}$ ... More
Effects of current on nanoscale ring-shaped magnetic tunnel junctionsApr 22 2008We report the observation and micromagnetic analysis of current-driven magnetization switching in nanoscale ring-shaped magnetic tunnel junctions. When the electric current density exceeds a critical value of the order of $6\times 10^{6}$A/cm$^2$, the ... More
Localization and mass spectra of various matter fields on scalar-tensor braneOct 22 2014Jan 19 2015Recently, a new scalar-tensor braneworld model was presented in [Phys. Rev. \textbf{D 86} (2012) 127502]. It not only solves the gauge hierarchy problem but also reproduces a correct Friedmann-like equation on the brane. In this new model, there are two ... More
Event generators for $η/η^{\prime}$ decays at BESIIIMar 29 2017Dec 08 2017The light unflavoured meson $\eta/\eta^{\prime}$ decays are valuable for testing non-perturbative quantum chromodynamics and exploring new physics beyond the Standard Model. This paper describes a series of event generators, including $\eta/\eta^{\prime}\to\gamma ... More
Dual Graph-Laplacian PCA: A Closed-Form Solution for Bi-clustering to Find "Checkerboard" Structures on Gene Expression DataJan 21 2019In the context of cancer, internal "checkerboard" structures are normally found in the matrices of gene expression data, which correspond to genes that are significantly up- or down-regulated in patients with specific types of tumors. In this paper, we ... More
Uniaxial strain on graphene: Raman spectroscopy study and bandgap openingOct 20 2008Graphene was deposited on a transparent and flexible substrate and tensile strain up to ~0.8% was loaded by stretching the substrate in one direction. Raman spectra of strained graphene show significant redshifts of 2D and G band (-27.8 cm^-1 and -14.2 ... More
Time-resolved Measurement of Quadrupole Wakefields in Corrugated StructuresFeb 25 2016Corrugated structures have recently been widely used for manipulating electron beam longitudinal phase space and for producing THz radiation. Here we report on time-resolved measurements of the quadrupole wakefields in planar corrugated structures. It ... More
Novel Monte Carlo representation for shell model in the complex energy planeJun 05 2013A Monte Carlo method is presented to evaluate quantum states with many particles moving in the continuum. The scattering state is generated at each time by a Monte Carlo random sampling algorithm. The same calculation are repeated until the average energies ... More
Shell evolution and its indication on the isospin dependence of the spin-orbit splittingAug 31 2012Jun 05 2013The available experimental data on shell evolution indicate that the strength of the spin-orbit (SO) single-particle potential may be enhanced in neutron-rich nuclei. We observe that such a simple scheme destroys the Harmonic Oscillator (HO) magic numbers ... More
Fiber-Optic quantum two-way time transfer with frequency entangled pulsesDec 25 2018High-precision time transfer is of fundamental interest in physics and metrology. Quantum time transfer technologies with frequency entangled pulses have been proposed for its potential enhancement of the precision and guaranteed security by the complementarity ... More
Radio observations of the first three-month Fermi-AGN at 4.8 GHzOct 09 2011Using the Urumqi 25m radio telescope, sources from the first three-month Fermi-LAT detected AGN catalog with declination >0 were observed in 2009 at 4.8 GHz. The radio flux density appears to correlate with the gamma-ray intensity. Intra-day variability ... More
Controlled-phase manipulation module for orbital-angular-momentum photon statesDec 25 2017Phase manipulation is essential to quantum information processing, for which the orbital angular momentum (OAM) of photon is a promising high-dimensional resource. Dove prism (DP) is one of the most important element to realize the nondestructive phase ... More
Enhancing the magnetoelectric coupling of Co4Nb2O9[100] by substitution of Mg for CoAug 09 2018We report experimental studies on enhancing the magnetoelectric (ME) coupling of Co$_4$Nb$_2$O$_9$ by substitution of non-magnetic metal Mg for Co. A series of single crystal Co$_{4-x}$Mg$_x$Nb$_2$O$_9$ (x=0, 1, 2, 3) with a single-phase corundum-type ... More
Topological triply-degenerate point with double Fermi arcsNov 16 2018Unconventional chiral particles have recently been predicted to appear in certain three dimensional (3D) crystal structures containing three- or more-fold linear band degeneracy points (BDPs). These BDPs carry topological charges, but are distinct from ... More
Temporal Selective Max Pooling Towards Practical Face RecognitionSep 22 2016Sep 26 2016In this report, we deal with two challenges when building a real-world face recognition system - the pose variation in uncontrolled environment and the computational expense of processing a video stream. First, we argue that the frame-wise feature mean ... More
Nullity of quantum discord of two-qubit X-state systemsJan 26 2011The conditions are established for nullity of quantum discord for mixed states of a general two-qubit system whose dynamical behaviour is given by an X-state form density matrix. It is found that quantum discord can vanish at a finite time even in the ... More
Correlation analysis of radio properties and accretion-disk luminosity for low luminosity AGNsNov 26 2016The correlation between the jet power and accretion disk luminosity is investigated and analyzed with our model for 7 samples of low luminosity active galactic nuclei (LLAGNs). The main results are: (1) the power-law correlation index ($P_{jet} \propto ... More
A resource-saving realization of the polarization-independent orbital-angular-momentum-preserving tunable beam splitterOct 02 2017Tunable beam splitter (TBS) is a fundamental component which has been widely used in optical experiments. We realize a polarization-independent orbital-angular-momentum-preserving TBS based on the combination of modified polarization beam splitters and ... More
Probing charged impurities in suspended graphene using Raman spectroscopyDec 22 2008Feb 19 2009Charged impurity (CI) scattering is one of the dominant factors that affect the carrier mobility in graphene. In this paper, we use Raman spectroscopy to probe the charged impurities in suspended graphene. We find that the 2D band intensity is very sensitive ... More
Beyond Gisin's Theorem and its Applications: Violation of Local Realism by Two-Party Einstein-Podolsky-Rosen SteeringApr 10 2014Mar 10 2015We demonstrate here that for a given mixed multi-qubit state if there are at least two observers for whom mutual Einstein-Podolsky-Rosen steering is possible, i.e. each observer is able to steer the other qubits into two different pure states by spontaneous ... More
Phase transition of the q-state clock model: duality and tensor renormalizationJun 12 2017We investigate the critical behavior and the duality property of the ferromagnetic $q$-state clock model on the square lattice based on the tensor-network formalism. From the entanglement spectra of local tensors defined in the original and dual lattices, ... More
Spin-orbit corrections of order $mα^6$ to the fine structure of $(37,35)$ state in $^4{He}^+\bar{p}$ atomAug 11 2009Precise numerical calculation of radiofrequency intervals between hyperfine sublevels of the $(37,35)$ state of the antiprotonic helium-4 atom is presented. Theoretical consideration includes the QED corrections of order $m\alpha^6$ to the electron spin-orbit ... More
A global study of Type B quasi-periodic oscillation in black hole X-ray binariesJan 18 2017We performed a global study on the timing and spectral properties of type-B quasi-periodic oscillations (QPOs) in the outbursts of black hole X-ray binaries. The sample is built based on the observations of {\it Rossi X-ray Timing Explorer}, via searching ... More
On the relation of accretion rate and spin induced jet power in low luminosity AGNOct 09 2014From Liu and Han (2014), the accretion-dominated jet power has a linear proportionality with the accretion rate, whereas the power law index is <=0.5 at lower accretion rate. Attributing the jet power in low accretion rate AGN to the black hole spin, ... More
Non-Markovian property of afterpulsing effect in single-photon avalanche detectorJun 06 2016The single-photon avalanche photodiode(SPAD) has been widely used in research on quantum optics. The afterpulsing effect, which is an intrinsic character of SPAD, affects the system performance in most experiments and needs to be carefully handled. For ... More
Graph Embedding on Biomedical Networks: Methods, Applications, and EvaluationsJun 12 2019Motivation: Graph embedding learning which aims to automatically learn low-dimensional node representations has drawn increasing attention in recent years. To date, most recent graph embedding methods are mainly evaluated on social and information networks ... More
The physical fundamental plane of black hole activity: revisitedNov 27 2015The correlation between the jet power and accretion disk luminosity is investigated for active galactic nuclei (AGNs) and black hole X-ray binaries (BHXBs) from the literature. The power-law correlation index is steep ($\mu \sim$ 1.0--1.4) for radio loud ... More
Dove prism in single-path Sagnac interferometer for orbital-angular-momentum photon statesJun 13 2017Jun 14 2017The degree of freedom of orbital angular momentum (OAM) is an important resource in high-dimensional quantum information processing, as the quantum number of OAM can be infinite. The Dove prism (DP) is a most common tool to manipulate the OAM light, such ... More
Finite-Temperature Charge Dynamics and the Melting of the Mott InsulatorAug 29 2018Jun 28 2019The Mott insulator is the quintessential strongly correlated electronic state. We obtain complete insight into the physics of the two-dimensional Mott insulator by extending the slave-fermion (holon-doublon) description to finite temperatures. We first ... More
A generalized Lanczos method for systematic optimization of tensor network statesNov 29 2016We propose a generalized Lanczos method to generate the many-body basis states of quantum lattice models using tensor-network states (TNS). The ground-state wave function is represented as a linear superposition composed from a set of TNS generated by ... More
Adversarial Learning in Statistical Classification: A Comprehensive Review of Defenses Against AttacksApr 12 2019With the wide deployment of machine learning (ML) based systems for a variety of applications including medical, military, automotive, genomic, as well as multimedia and social networking, there is great potential for damage from adversarial learning ... More
The Nehari manifold for fractional p-Laplacian system involving concave-convex nonlinearities and sign-changing weight functionsNov 17 2017In this paper, we consider a fractional p-Laplacian system with both concave-convex nonlinearities and sign-changing weight functions in bounded domains. With the help of the Nehari\ manifold, we prove that the system has at least two nontrivial solutions ... More
Carleman and observability estimates for stochastic beam equationOct 09 2017Jan 05 2018In this paper, we establish a weight identity for stochastic beam equation by means of the multiplier method. Based on this identity, we first establish the global Carleman estimate for the special system with zero initial value and end value, then a ... More
Magnetosphere structure of a Kerr black hole: marginally force-free equatorial boundary conditionJul 15 2018Sep 23 2018The role of equatorial boundary condition in the structure of a force-free black hole magnetosphere was rarely discussed, since previous studies have been focused on the field lines entering the horizon. However, recent high-accuracy force-free electrodynamics ... More
Quasi-Elliptic Cohomology IMay 14 2018Aug 24 2018Quasi-elliptic cohomology is a variant of elliptic cohomology theories. It is the orbifold K-theory of a space of constant loops. For global quotient orbifolds, it can be expressed in terms of equivariant K-theories. Thus, the constructions on it can ... More
On 2D Viscoelasticity with Small StrainApr 08 2009An exact two-dimensional rotation-strain model describing the motion of Hookean incompressible viscoelastic materials is constructed by the polar decomposition of the deformation tensor. The global existence of classical solutions is proved under the ... More
A holographic model for the baryon octetJul 21 2016By adopting the nonlinear realization of chiral symmetry, a holographic model for the baryon octet is proposed. The mass spectra of the baryon octet and their low-lying excited states are calculated, which show good consistency with experiments. The couplings ... More
Group velocity of the acoustic eigen-modes in sonic crystalsNov 06 2004In this brief report, the group velocity of the eigen-modes in sonic crystals is derived, and shown to equal the averaged energy velocity of the eigen-modes. How the group velocity can be used to describe acoustic energy flows in sonic crystals is discussed. ... More
Sound generated by rubbing objectsOct 09 2003In the present paper, we investigate the properties of the sound generated by rubbing two objects. It is clear that the sound is generated because of the rubbing between the contacting rough surfaces of the objects. A model is presented to account for ... More
Are waves all localized in two dimensional random media?Oct 19 2002It has been the dominant view for over two decades that all waves are localized in two dimensions for any given amount of disorder. Here, I would like to raise questions about this assertion. The discussion leads to the conclusion that there is a lack ... More
Unveiling the Charge Density Wave Inhomogeneity and Pseudogap State in 1T-TiSe2Nov 30 2016Mar 30 2018By using scanning tunneling microscopy (STM) / spectroscopy (STS), we systematically characterize the electronic structure of lightly doped 1T-TiSe2, and demonstrate the existence of the electronic inhomogeneity and the pseudogap state. It is found that ... More
Studies of LL-type 500MHz 5-cell superconducting cavity at SINAPJul 11 2014Aug 22 2014A low loss (LL) type 500 MHz 5-cell superconducting niobium prototype cavity with large beam aperture has been developed successfully including the optimization, the deep drawing and electron beam welding, the surface treatment and the vertical testing. ... More
Transport and Phototransport in ITO Nanocrystals with Short to Long-Wave Infrared AbsorptionJan 02 2019Nanocrystals are often described as an interesting strategy for the design of low-cost optoelectronic devices especially in the infrared range. However the driving materials reaching infrared absorption are generally heavy metalcontaining (Pb and Hg) ... More
Screening Tests for Lasso ProblemsMay 19 2014Aug 21 2016This paper is a survey of dictionary screening for the lasso problem. The lasso problem seeks a sparse linear combination of the columns of a dictionary to best match a given target vector. This sparse representation has proven useful in a variety of ... More
Global Norm-Aware Pooling for Pose-Robust Face Recognition at Low False Positive RateAug 01 2018In this paper, we propose a novel Global Norm-Aware Pooling (GNAP) block, which reweights local features in a convolutional neural network (CNN) adaptively according to their L2 norms and outputs a global feature vector with a global average pooling layer. ... More
Properties of the narrow line Seyfert 1 galaxies revisitedMay 05 2016Jun 20 2016There is growing evidence to suggest that the black hole mass has been previously underestimated with the H$\beta$ line width for certain active galactic nuclei (AGN). With the assumption of the flatter rather than isotropic velocity distribution of gases ... More
Production of charmed baryon $Λ_c(2940)^+$ at PANDASep 26 2011Nov 25 2011In this work we evaluate the production rate of the charmed baryon $\Lambda_c(2940)^+$ at PANDA. For possible assignments of $\Lambda_c(2940)^+$: $J^P=1/2^\pm$, $3/2^\pm$ and $5/2^\pm$, the total cross section of $p\bar{p}\to \bar{\Lambda}_c \Lambda_c(2940)^+$ ... More
$D_{sJ}(2860)$ and $D_{sJ}(2715)$Sep 04 2006Jan 12 2007Recently Babar Collaboration reported a new $c\bar{s}$ state $D_{sJ}(2860)$ and Belle Collaboration observed $D_{sJ}(2715)$. We investigate the strong decays of the excited $c\bar{s}$ states using the $^{3}P_{0}$ model. After comparing the theoretical ... More
Real-space characterization of reactivity towards water at Bi2Te3(111) surfaceJun 26 2016Surface reactivity is important in modifying the physical and chemical properties of surface sensitive materials, such as the topological insulators (TIs). Even though many studies addressing the reactivity of TIs towards external gases have been reported, ... More
Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-SendingFeb 17 2019Channel loss seems to be the most severe limitation to the application long distance quantum key distribution in practice. The idea of twin-field quantum key distribution can improve the key rate from the linear scale of channel loss in the traditional ... More
Multistep shell model description of spin-aligned neutron-proton pair coupling: The formalismAug 02 2011The multistep shell model was extended recently to incorporate both neutron and proton degrees of freedom and applied to study the structure of $N=Z$ systems with four, six and eight particles [arXiv:1108.0269]. In this work we give a brief introduction ... More
Measurement-device-independent quantum key distribution over untrustful metropolitan networkSep 28 2015Sep 30 2015Quantum cryptography holds the promise to establish an information-theoretically secure global network. All field tests of metropolitan-scale quantum networks to date are based on trusted relays. The security critically relies on the accountability of ... More
Uncovering the progenitor of the Cetus stream with StarGO -- a low mass dwarf with a nuclear star clusterFeb 14 2019We use a novel cluster identification tool StarGO to explore the metal poor ([Fe/H] $<$ -1.5) outer stellar halo (d $>$ 15 kpc) of the Milky Way using data from Gaia, LAMOST and SDSS. Our method is built using an unsupervised learning algorithm, a self-organizing ... More
Experimental measurement-device-independent quantum digital signatures over a metropolitan networkMar 03 2017Mar 07 2017Quantum digital signatures (QDS) provide a means for signing electronic communications with informationtheoretic security. However, all previous demonstrations of quantum digital signatures assume trusted measurement devices. This renders them vulnerable ... More
Thermal decoherence of long-distance entanglement in spin-1 chainsAug 21 2009he thermal entanglement is generated by weakly interacting atoms with an isotropic spin-1 chain. The decoherence of the entanglement is mainly investigated. The effective Hamiltonian is analytically obtained by the approximation method of perturbation. ... More
Simultaneous Deformations of Lie Algebroids and Lie SubalgebroidsJul 18 2012Feb 28 2013The $L_\infty$-algebra is an algebraic structure suitable for describing deformation problems. In this paper we construct one $L_\infty$-algebra, which turns out to be a differential graded Lie algebra, to control the deformations of Lie algebroids and ... More
Estimation and Verification of Partially-Observed Discrete-Event SystemsMar 27 2019This article considers state estimation and veri cation problems for an important class of man-made cyber-physical systems called Discrete-Event Systems (DES).
Parity preservation of $K$-types under theta correspondenceMar 31 2016Jan 04 2018This note shows a property of degree-parity preservation for $K$-types under Howe's theta correspondence. As its application, we deduce the preservation of parity of all $K$-types occurring in an arbitrary irreducible $(\mathfrak{g},K)$-module of any ... More
Quantum Dilaton Gravity in the Light-cone GaugeSep 18 1992Recently, models of two-dimensional dilaton gravity have been shown to admit classical black-hole solutions that exhibit Hawking radiation at the semi-classical level. These classical and semi-classical analyses have been performed in conformal gauge. ... More
A Note On The Isoperimetric Inequality And Its StabilityFeb 28 2011In this paper, we deals with isoperimetric-type inequalities for closed convex curves in the Euclidean plane R^2. We derive a family of parametric inequalities involving the following geometric functionals associated to a given convex curve with a simple ... More
Quantum renormalization of entanglement in an antisymmetric anisotropic and bond-alternating spin systemAug 08 2012The quantum renormalization group method is applied to study the quantum criticality and entanglement entropy of the ground state of the Ising chain in the presence of antisymmetric anisotropic couplings and alternating exchange interactions. The quantum ... More
On the Optimal Rates of Convergence for Quadratures Derived from Chebyshev PointsAug 20 2013Jul 27 2014In this paper, we study the optimal general convergence rates for quadratures derived from Chebyshev points. By building on the aliasing errors on integration of Chebyshev polynomials, together with the asymptotic formulae on the coefficients of Chebyshev ... More
Adjoint Transform of Willmore Surfaces in $n$-sphereAug 08 2005After the surface theory of M\"obius geometry, this study concerns a pair of conformally immersed surfaces in $n$-sphere. Two new invariants $\theta$ and $\rho$ associated with them are introduced as well as the notion of touch and co-touch. This approach ... More
Non-orthogonal geometric realizations of Coxeter groupsDec 15 2011Feb 28 2013We define in an axiomatic fashion a \emph{Coxeter datum} for an arbitrary Coxeter group $W$. This Coxeter datum will specify a pair of reflection representations of $W$ in two vector spaces linked only by a bilinear paring without any integrality and ... More
Explicit induction principle and symplectic-orthogonal theta liftsJul 10 2014Mar 08 2017During the last two decades, great efforts have been devoted to the calculation of the local theta correspondence for reductive dual pairs. However, uniform formulas remain elusive for real dual pairs of type I. The purpose of this paper is twofold: to ... More
How to detect super-massive binary black holes at parsec scalesOct 09 2014Jan 05 2015It is difficult to find or identifying the binary black holes in parsec scales, since the dual AGN may be merged quickly. It is required to explore more possibilities to identifying binary black holes in parsec scales, we give some discussions, especially ... More
Infinitely many homoclinic solutions for a class of subquadratic second-order Hamiltonian systemsJan 26 2015Oct 01 2016In this paper, we mainly consider the existence of infinitely many homoclinic solutions for a class of subquadratic second-order Hamiltonian systems $\ddot{u}-L(t)u+W_u(t,u)=0$, where $L(t)$ is not necessarily positive definite and the growth rate of ... More